US1141751A - Printing-telegraph system and alphabet. - Google Patents

Description

C. G. ASHLEY.

PRINTING TELEGRAPH SYSTEM AND ALPHABET.

APPLICATION FILED MAY 27, I912- Patented June 1, 1915.

THE NDRRIS PETERS CO4, PHom-LITHQ. wAsHlNGmN. D c,

C. G. ASHLEY.

PRINTING TELEGRAPH SYSTEM AND ALPHABET.

APPLICATION FILED MAY 27. 1912.

1,141,751 Patented June 1, 1915.

2 SHEETS-SHEET 2.

FIG. 5.

I 5 l7 L/IU' LL/|+|FWJ I /IH H UI mTNE5sEs:- INVENTOR,

@ -ZJW Y paw-3% THE NORRIS PETERS C0,. FHOTO-LITHQ, WASHINGmN, D. c

imiran srarnsrarnn'r airmen CHARLES Gr. ASHLEY, OF CHICAGO, ILLINOIS, ASSIG-NOR T0 GENERAL ENGINEERING AND CONSTRUCTION COMPANY, LIMITED, OF TORONTO, ONTARIO, CANADA, A COR- PORATION OF ONTARIO.

PRINTING-TELEGRAPH SYSTEM AND ALPHABET.

To all whom it may con cern Be it known that 1, CHARLES G. ASHLEY, a citizen of the United States of America, and a resident of Chicago, county of Cook, and State of Illinois, have invented a new and useful Improvement in Printing-Telegraph Systems and Alphabets, of which the following is a specification.

My invention relates to automatic printing' telegraph systems and pertains especially to systems of the class which employ a plurality of componentprinting elements or types, the complete legible characters being formed by impressions in proper relation and sequence from a plurality of the component types representing the various component parts of the characters to be recorded.

My invention comprises a novel and extremely simple system of apparatus and circuits by means of which I am enabled to utilize for both apparatus operation and transmission purposes the currents and frequencies in common use for lighting and power purposes and at the same time attain a high transmission speed as well as an extremely legible record. I accomplish these and other desiderata which will subsequently be disclosed herein, by employing a novel type of motor which is operated by a primary current to impart linealmotion to the recording and transmitting tapes, while the imprinting currents are secondary and of two intensities, their secondary nature making their respective instantaneous maximum current values available foritrans'mission purposes at intervals when the transmitting tape moving mechanism is substantially stationary, while the two intensities of the secondary current allow of utilizing a suificient number of component types to insure an extremely legible record. Further, by a design of printing symbol and alphabet, I am enabled for any given frequency of current to utilize an extremely short transmitting tape for a given message and totransmit this message at a maximum speed. I thus reduce the mechanism to a maximum of simplicity which makes for low maintenance, ease of operation and small cost of manufacture. V

'Hitherto in the art, it has been the practice to employ as an isolated source of ourrent for transmission purposes either bat- Specification of Letters Patent.

Patented June 1, 1915.

Application filed. May 27, 1912. Serial No. 629,870.

teries or motor driven generators and the use of these has increased the cost of the instrument and its bulk and has further added to the cost of maintenance and difficulties of adjustment.

In the figures whichaccompany and form a part of this specification and in which like numerals designate corresponding parts throughout Figure 1 is a diagrammatic v ew partly in perspective of the transmitting and receiving apparatus with the conductors connecting them. Fig. 2 is an enlarged plan view of the printing types as they are arranged in the form of a monogram in the receiver. Fig. 3 is a plan View of the printing mechanism of the receiver. Fig. 4: is a diagrammatic View of the tape moving mechanism at the receiving station, together with an elevation of the printing mechanism. Fig. 5 shows a sectional transmittingtape perforated to transmit all of the Roman characters and Arabic numerals and shows further the appearance of the characters as imprinted on the recording tape.

The transmitter shown at the left in Fig. 1 comprises a transformer 23 the primary of which is connected through conductors 26 and 27 with any convenient commercial lighting or power circuit, while one terminal of the secondary is connected through conductor 24; with ground; a series of variant- Voltage taps as 23, 23 23 and 23 are taken from the secondary, a. relatively high voltage tap 23 being connected to an insulated brush or plate 14, while a relatively low voltage tap 23* is connected to the insulated brush or plate 15. A brush 12 bears upon and makes contact with plate 15 while a brush 18 bears upon and makes contact with both plates 15 and 1 1. Brush 12 is connected to line conductor 10 while brush 13 is connected to line conductor 11. A drum 16 which may be of metallic or non-metallic material, is provided with a median row of equally spaced projections 16 and is rigidly mounted upon a shaft 16 in close proximity with plates 14 and 15 and in such relation thereto that a transmitting tape provided with a median row of perforations engaging the projections 16 may be drawn by the rotation of drum 16 longitudinally between the brushes 12 and 15 and the platen formed by the plates 14 and 15. A

60 allow brush 13 to make contact with either ratchet wheel 17 is rigidly attached to the shaft 16 and rotates therewith and with drum 16. A pair of pawls 18 and 19 are each pivoted at one extremity to the extremities of the bell crank and are retained against the teeth of the ratchet wheel 17 by means of the springs 18 and 19 respectively. The armature 28 is rigidly attached to the bell crank 20 and the member so formed is pivoted by means of the shaft 7 20 to one pole of the polarizing magnet 25. The armature 28 is free to swing about its 'pivot 20 between the pole faces of the electromagnets 21 and 22 which are mounted rigidly to the remaining pole of the magnet 25. The windings of the electromagnets 21 and 22 are connected in series and to the 7 on plate 14 through secondary tap 28 a commercial supply source through conductors 26 and 27. The magnets 21 and 22 are so wound and connected that when energi'zed, unlike magnetic poles are induced on their pole faces, that is their magnetic poles are in rotation. An alternating primary current of a definite frequency when energizing magnets 21 and 22 therefore causes armature 28 to vibrate in unison therewith, thus rocking the bell crank 20 about pivot 20 and through pawls 18 and 19, ratchet Wheel 17 and shaft 16 imparting rotary motion to drum 16. r

Ratchet wheel 17 is provided with twice as many teeth as there are projections on the I drum 16, and the ratchet wheel is so placed in angular relation with the. drum 16 that the radial face of every second tooth is always in the same radial plane'as that occupied by the radial axis of a projection as 16. Thus given a cycle operating source of current, armature 28 will make one vipositive and negative potential of a relatively higher'intensity. As brush 12 bears upon'plate 15 and is connected to line conductor 10, there is being placed successively upon that conductor positive and negative potential'of a definite intensity, while as brush 13 bears upon both plates 15 and 14:,

it is possible through a predetermined spac: ing of perforations in a transmitting tape to plate 15 or 1 1 and thereby to place selectively upon line conductorslO 'or'll positive or negative potentials of variant 'in-- tensities, r

The contact line of the brushes 12 and 13 r with the platen formed by plates 1a and 15 is maintained a distance from the axis of rotation of drum l6-which is a multiple of the unit of motion of the transmitting tape.

This unit being defined as that distance through which the tape is moved while drum 16 is rotated through one half the angular distance between any two consecutive teeth on the ratchet wheel17 or that is while armature 28 is making one complete movement in one direction; Thus, as the secondary current lags substantially 90 be hind the primary current the dividing line between any two consecutive tape intervals falls under the contact line of the brushes with the platen at that instant when the necessary current of the transformer 23 is at a maximum instantaneous values For while armature 28 is making a complete movement in one'direction thus moving drum 16 through one angular, unit, the secondary current of that particular potential V is building up to a maximum value which is reached at substantially the instant when the primary current is zero or that is, when the armature 28 and-drum 16fare substan-V V tially stationary and hence by a. correct transverse and longitudinal spacing of perforations in a transmittingtape, it is possible to selectively place over either line conductor to ground a positive or negativeimpulse'of current of a definiteintensity: and upon one line to ground a positive and negative impulse of current of. variant intensity. 7

The correct longitudinal spacing of 'the'perforationsin the tape insures that these 'current impulses will be available for transmission atinstants of the maximum'value of their respectlve potent als.

Referring now especially to Figs. 1, 3 land 7 4, the receiving apparatus comprises a U j it shaped polarizing magnet 30, one leg of which extendsa distance beyond the'other and is provided with a series of alined openings as 1 Figfil. Five operating solenoids 1, 2, 3, 1 and dare positioned within the U shaped magnet with their central openings in register with the respective openings as 4 in magnet 30 and are rigidly attached thereto of magnet 30 extends slightly inwardly beyondthe outline of the central openings of each of the solenoids; A plate, of magnetic material 32 is attached'to thelonger leg of magnet 30 and serves tosupport the pole piece 31 which extendsinwardly beyond the to maintain such register. The ishorter leg 7 outline; of thecentral openings of all of the j solenoids and is maintained at adefinite distance from the face of the shorter leg of magnet 30 to provide a definite air'gap' for the polarizing magnet 30. 7 I a One extremity of each of a. series of hell crank shaped armatures 1, 2, 8, 4 and 5 passes through their respective-apertures in- 4 and 5, is borne as an integral part thereof upon each extremity of the armatures 1, 2, 3, 4 and 5 respectively which lie without the operating helix and these extended portions of the armatures are bent to bring their respective type faces into such relation to each other as to form the printing monogram shown in Fig. 3, or as shown greatly enlarged in Fig. 2. The solenoids 3 and 4 controlling armatures 3 and 4 and consequently printing the types 3 and 4 are connected in series, with their magnetic poles when energized in rotation, and to the line conductor 10 and ground. The solenoids controlling armatures 2, 5' and 1 and consequently printing types 2, 5 and 1, are connected in' series with the magnetic poles of solenoids 2 and 5 in rotation and the magnetic poles of solenoids 5 and 1 in parallel and the group so formed is connected to line conductor 11 and ground. Thus an impulse of current over line conductor 10, through solenoids 3 and 4 to ground induces unlike poles upon the extremities thereof while an impulse of current over line conductor 11 through solenoids 2, 5 and 1 to ground induces unlike poles upon the extremities of solenoids 2 and 5 and like poles on the extremities of solenoids 5 and 1. The solenoids 3, 4, 2 and 5 are wound to operate their respective armatures when energized by one predetermined intensity of current, while solenoid 1 is wound to operate its armature only when energized by a current intensity which is substantially 2, 3'

or more times that necessary to operate armatures 3, 4, 2 or 5.

An anvil 34 is placed adjacent to all of the printing types and is adjustable in its distance therefrom. A receiving tape 34 rests on the surface of the anvil 34 and is drawn longitudinally between the anvil and the printing types by means of the roller 35 and idler 50. A strip of impression paper 34 is maintained between the printing types and the receiving tape 34 and allows of re.- cording the impression of the types on the recording tape. I

A ratchet wheel 36 which is the exact counterpart of the ratchet wheel 17 of the transmitter is rigidly attached to the shaft of the roller 35 and rotates therewith and with the roller 35. The mechanism for im tremities of the bell crank 39 and are retained in position against the teeth of the ratchet wheel 36 by means of the springs 37 and 33 respectively. An armature 48 is rigidly attached to the bell crank 39 and the member thus formed is pivoted by means of the pin 39 to one extremity of the polarizing magnet 40. The armature 48 is free to move about its pivot 39 between the pol faces of a pair of electromagnets 41 and 42 which are rigidly attached to the remaining extremity of the polarizing magnet 40. The electromagnets 41 and 42 are connected in series with their magnetic poles in rotation and are connected to the leads 46 and 47 of any commercial lighting or power source of alternating current at the receiving station. A transformer 43 is connected to the leads 46 and 47 as at the transmitting station, the secondary of the transformer being connected to the transmitting apparatus at the receiving station which is in all respects similar to that shown in Fig. 1. Thus assuming that the leads 46 and 47 are connected to a 60 cycle supply current, the armature 48 will vibrate at the same rate as the armature 28 at the transmitting station and through the pawls 37 and 38, ratchet wheel 36, roller and idler 50, will draw the receiving tape 34 longitudinally under the printin type faces at the same or a proportionally lineal rate as that at which the transmitting tape is drawn through the transmitter at the transmitting station, dependent upon the relative diameters of the drums 16 and 35.

The operation of my device is as fol lows: Assuming that the primary of the transformer 23 at the transmitting sta tion is connected with a 60 cycle source of current and that magnets 21 and 22 are likewise connected to this source of current and assuming further that the magnets'41 and 42 at the receiving station are connected with a similar source of current at the receiving station, then if a perforated transmitting tape be provided with a central row of registry perforations and be placed on drum 16 so that these perforations invaginate the projections 16, the tape may be drawn between the brushes 12 and 13 and the plates 14 and 15 at a uniform rate as hitherto explained. Now if a recording tape be placed between the roller and idler 50. it will be drawn under the type faces 1 2 3 4 and 5 at the same or a proportionally lineal rate as that of the transmitting tape as has hitherto been explained. The lines rate at which the transmitting and receiving tapes move is such that a unit of length of each tape passes under the contact line of brushes 12 and 13 and under the printing types respectively, while the respective primary currents are making one half cycle. At the transmitting station while the primary current is making one half cycle and the transmitting tape is moving longitudinally over one unit of length under brushes 12 and 13, the secondary currents are building up to a maximum instantaneous value of the same potential as the primarypotential at that instant and are impressed on the plates 14 and 15. This maximum instantaneous value of the secondary is reached when the transmitting tape has moved un-- der the contact line of the brushes 12 and 13 with plates 14: and 15 one complete tape interval. If now a perforation be placed in the transmitting tape and be so spaced laterally that it allows contact to be made between brush 12 and plate 15 at the instant when the tape hasmoved over one tape unit and is at rest, an impulse of current of maximum instantaneous value which I will assume occurs at that instant in a current cycle when its potential is positive will be sent from the secondary of induction coil 23 through tap 23, plate 15, brush 12, line conductor 10, through operating solenoids 3 and 41 to ground and thence back to the secondary of transformer 23. Now, as the polarizing ma'gnet30 of the receiver normally maintains all of the armatures 1, 2, 3, 1 and 5 with their upper extremities against the pole face of its shorter leg, the pen faces 1, 2, 3, 41 and 5 are normally restrained from contact with the impression paper 34 'Hence a positive impulse of current through solenoids 3 and 1 will, as they are wound to have opposite poles when energized, reverse the polarity of one of their inclosed armatures as 4t from that polarity created therein by the polarizing magnet 30 and it will be repelled by the hitherto at tracting pole face of the polarizing magnet and urged by the influence of its-operating solenoid and the opposite pole face 31 to move toward pole face 31, thus causing its printing type t to strike the impression paper and record an impression of pen face 4 upon the receiving tape.

The energization of solenoid 3 vwith a current impulse of positive potential causes its normal polarity to be accentuated and it is, therefore, more strongly held against the polarizing magnet out of contact with the impression paper. Simultaneously through a perforation in the transmitting tape laterally spaced to allow of contact being made between brush 12 and plate 15, after the tapehas been moved by the drum 16 through the neXt succeeding tape unit, a negative im pulse ofcurrentof maximum instantaneous value'may be sent through thesecondary tap23 plate 15, brush'12, line'conductor '10, solenoids 3 andfl, and ground to operate Y armature 3 toimprint its type face 3 while type face 1 is'more strongly held out of contact with the impression paper. In a like manner, perforations may be spaced laterally in the tape to allow contact to be made between brush 13 and plate 15, and

may be further so spacedlongitudinallyas to transmit toasolenoids 2, 5 and 1 positive or negative impulses of currentfrom secondary tap "23 to operate "respectively printing types 5, and 2. solenoid 1 is adjusted to require "substantially three times the current necessary to operate armatures 2 and 5?, it does not op erate to imprint printing type 1 when energized w1th current from secondary tap 23 which operates .armatures 3', 4-,- 2 and 5'.

If, however, a perforation 'in the transmitting tape be so laterally spaced as to allow of contact being made between brush 13 and plate 1i and longitudinally spaced so as to permit a positive impulse of current,"

However, as

or the same polarity as that which operates tures 5 and 1 to simultaneously imprint printing types 5 and 1. At the receiving station, the tape'3 l is being drawn l'ongi-T tudinally under the printing types at a lineal rate which is equal, or'proportional to, the lineal speed of the transmittingtape in order that by the operating of the trans" niitter the impressions ofthe types maybe recorded in proper relation to preceding imprints to build uplegible characters Referring now to Fig. 2, in which I have 7 shown a plan iew of the printing types, as they appear in the receiver, or the figure may be looked upon asan enlarged record of the imprints of all of the types were they simultaneously imprinted upon a stationary receiving surface, type faces 1, 2. and 3 are each in width equal to the width of a complete normal character such as A?. normal character is divided into two 'arb1- trary un1ts of width, and prmtmg types 2 and 3 are separated from types 1, 5 and 4 Printing by one of these arbitrary units. type 1 abuts at one extremity with one extremity of type with 5 while types l and 5 abut at one extremity each and are a'lined longitudinally. The drum 36 is of such relative diameter with drum'16 that while the transmitting tape is moving one longitudinal unit, the receiving tape is moving, or has moved,I dependent upon the phase relation between the operating current at the transmitting stationfand the operating current at the receiving station, a distance which is proportionalto thedis tance moved, by thetransmittingtape and: Q

is further} equal to" arbitrary 'uniti' of I width of the pen faces 2 and 3 or one half the width of a complete normal character.

Referring now to Fig. 5, which illustrates a section of transmitting tape perforated with all of the perforations necessary to transmit the characters of the alphabet and numerals from 0 to 9, and the outline of the characters as they appear on the receiving tape, the longitudinal line (34) is an arbitrarily chosen line of contact between brush 12 and plate 15. The longitudinal line 56 is a median line, along which the registry perforations, which invaginate the projection 16 on drum 16 are placed. The longitudinal line (25) is an arbitrarily chosen line of contact between brush 13 and plate 15 while the longitudinal line (5 and 1) is a similarlyrchosen line of contact between brush 13 and plate 14. The transverse lines 1+, 2-, 3+ and 4 are spaced a distance apart, which is defined by the angular distance through which the drum 16 is moved by a complete movement in one direction of armature 28 caused bya one half cycle of the operating current and, as hitherto explained, while the secondary cur-- rent is changing from a maximum of one potential to a maximum of the opposite potential. l have arbitrarily chosen a ratchet wheel with twice as many teeth as there are projections on the drum 16 and as the drum is rotated through the angular distance of one half the distance between any two successive teeth in the ratchet wheel for every half cycle of operating current, there are between any two successive registry perforations in the transmitting tape four tape in tervals or instants when the instantaneous maximum value of the secondary current may be utilized'for transmission purposes, hence, while the tape is moving under the contact line of the brushes 12 and'13 with the plates 14 and 15, a distance of four of these tape intervals, there will be impressed on the plates 14 and 15, two cycles of secondary current, which will reach their respective maximum values at instant when the dividing line between any two tape in-- tervals is under the contact line of the brushes 12 and 13 with the plates 14 and 15. A perforation spaced along the line (34) will allow of contact being made between brush 12 and plate 15 to send positive and negative impulses through solenoids 3 and 4 while a perforation spaced along the line will allow of contact being made be tween brush 13 and plate 15 to send positive and negative impulses through solenoids and 5. A perforation spaced along line (5 and 1) will allow of contact being made between brush 13 and plate 14 to send positive and negativeimpulses of augmented intensity through solenoids 2, 5 and 1 to operate armatures 5 and 1 simultaneously. The

longitudinal spacing of the perforations along any of the longitudinal lines determines the polarity of the impulses as hitherto explained.

The method of building up legible characters is as follows: Assuming the transmitter and receiver in operation, as hitherto explained, then the transmitting tape, Fig. 5, is being drawn longitudinally from right to left between the brushes 12 and 13, and plates 14 and 15, and the receiving tape 34 is being drawn from right to left under the type faces, as viewed in Fig. 2. And assuming further that the secondary current reaches a maximum positive value at that instant when the rotation of the drum 16 has brought a registry perforation in the transmitting tape on the contact line of brushes 12 and 13 with plates 14 and 15. Then a pair of perforations along the transverse line 1+, one on the longitudinal line (34) and the other longitudinal line (5 and 1), will allow of contact being made simulta neously between brush 12 and plate 15, and

brush 13 and plate 14 to send a positive impulse of current of a relatively low intensity and maximum instantaneous value over line conductor lOthrough solenoids 3 and 4 to ground to operate armature 4, and a positive impulse of current of a relatively high intensity and maximum instantaneous value over line conductor 11 through solenoids 2, 5 and 1 to ground to operatesimultaneously armatures 5 and 1, resulting in simultaneously imprinting on the recording tape 84 through the medium of the impression paper 34 an impression of type faces 4, 5 and 1; after the transmitting tape has moved two tape intervals during which time the receiv' ing tape has moved two units of width of a. complete normal character or the width of a normal character, a pair of perforations in the transmitting tape along the transverse line 3+ one spaced longitudinally along line (34) and the other along the line (25), allow of contact being made simultaneously between brush 12 and plate 15, and brush 13 and plate 15 to simultaneously send over line conductors 10 and 11 positive impulses of relatively low intensity and maximum instantaneous value through solenoids 8, 4, 2, 5 and 1 to operate armatures 4 and 5 to imprint simultaneously on the receiving tape 34 impressions of type faces 4 and 5. These impressions will, as the receiving tape has moved the width of a complete normal character since the last impressions recorded thereon, fall with the upper extremity of the impression from type face 4 joining the free extremity of the impression of type face 1. After the trans mitting tape has moved one more interval and the receiving tape has moved again one unit of width of a complete normal character, a perforation in the transmitting tape 7 onthe line 4- and longitudinally spaced on the line (25) allow of contact being made between brush 13 and plate 15 to send over line conductor 11 through solenoids 2, 5 and 1a negative impulse of current of relatively low intensity and of maximum instantaneous value to operate armature 2 to imprint type face 2. This impression, as the receivingtape has moved since the last serles .OflDlPIBSSlODS a distance of one tape 1nto a minimum; that by such reduction I attain, for any given frequency of current, a maximum transmission speed; and that through the elimination of bulky and unwieldy batteries and motor generators, I have greatly simplified the apparatus and circuits and reduced the cost of manufacture and installation; andhave, atthe same time,

through this reduction in the number of operating parts-produced an instrument of v positive operation and one on which the cost of maintenance is very low. It will be further observed that as the transmitting tape passes through the transmitter at a comparatively high rate ofspeed and as the perforations are of small diameter the length of the operating impulse, while of sufiicient duration to insure proper operation of the printing types is, in reality, only momentary, thus the necessity for synchronism between the movement of the transmitter drum and the receiver drum is eliminated for should the two operating currents be at a maximum variation with each other, that is in phase quadrature, and the receiving drum be in motion when the type faces strike the impression paper, the interval during which the type faceisin contact with the impression paper is of such extremely short duration that the impression recorded on the receiving tape will not be blurred objectionably by the tape dragging under the type faces. It should be further noted that as the transmitter drum is moved through the angular distance defined as half the distance between the radial faces of any two suocessive teeth on the ratchet wheel 17, for each movement in one direction of the armature 28, the drum and ratchet wheel may be manually spun on their axis and allowed to the spirit or narrowing the scope ofmy invention. v v

Having thus described my invention, what I claim as new and desire to secure by the United States Letters Patent is as follows:

1. In a printing telegraph system, a source of primary current, means for utilizing said current to effect translatory motion, means for deriving a secondary current from said primary current, a plurality of printing types, operating magnets. associated therewith, and means for utilizing said translatorymot on jointly w1thsaid secondary current to selectivelyimpress on said operating magnets, current impulses of variant p0 larity v 2. In a printing telegraph system, asource of primary current, means for inductively deriving a secondary current from saidprimary current, said secondary current being displaced in its phase relation with said: primary current, meansforutilizing said primary current to effect-translatory motion, a plurality of printing devices, operating magnets therefor, and means for utilizing the maximum instantaneous value of said secondary'currents at instants of cessationflof said translatory motion, to impressuponselected groups of saidoperating magnets current impulses of variant polarity.

8.- In aprinting telegraph system, a source of primary current, a transmitting tape, means for utilizing said current ftoimpart llneal motion tosa d tape, means for deriving a secondary current from said primary. 7

current, a plurality of printing types, oper ating magnets associated therewith, and means for utilizing the lineal motion of said tape jointly with said secondary current to impress on said operating magnets, current impulses of variant polarity 4C. In a printing telegraph system, a primary source of alternating-current, means for deriving a secondary *source of current i from said primary source, means for utilizing said primary source of current to effect translatory motion, means for utilizing said secondary source of current for transmission purposes, a plurality of printingtypes, operating magnets associated with said print ing types and means for utilizing said translatory motion jointly with said secondary current to selectively impress on said operating magnets current impulses of variant polarity. a

5. In a printing telegraph system, a primary source of current, means for deriving a secondary source'of current from said primary source, said secondary source being displaced in its phase relation with said primary current, a transmitting tape, means for utilizing said primary current to impart lineal motion to said tape, a plurality of printing elements, operating magnets associated therewith, and means for utilizing the maximum instantaneous value of said secondary current at instants of cessation of the lineal motion of said tape to impress upon said operating magnets current impulses of variant polarity.

6. In a printing telegraph system, a source of alternating current, a transformer the primary of which is connected to said source, a ratchet motor connected to said source, a transmitting tape, means for utilizing said motor to impart lineal motion to said tape, a secondary current derived through the medium of said transformer from said alternating on rent, a plurality of printing types, operating magnets therefor, and means for utilizing the motion of said tape and said secondary currents jointly to impress upon such operating magnets current impulses of variant polarity.

7. In a printing telegraph system, a primary source of current, means for deriving a secondary source of current from said primary source, a transmitting tape, means for utilizing said primary source of current to impart longitudinal motion to said tape, a plurality of printing elements, operating electro-magnetsassociated with said printing elements, and means for utilizing the longitudinal motion of said tape jointly with said secondary currents, to selectively impress upon certain groups of said operating magnets current impulses of variant polarity and definite intensity and to impress upon other groups of said electro-magnets current impulses of definite polarity and variant intensity.

8. In a printing telegraph system, a primary current, a second current displaced in its phase relation thereto, a transmitting tape, means for utilizing said primary current to impart lineal motion to said tape, a plurality of printing elements operating magnets associated therewith and means for utilizing the maximum instantaneous value of said other current at instants of cessation of the lineal motion of said tape to impress upon certain groups of said operating magnets current impulses of variant polarity and definite intensity and to impress upon other groups of said operating magnets current impulses of definite polarity and variant intensity.

9. In a printing telegraph system, a source of alternating current, a transformer the primary of which is connected to said source, a ratchet motor connected to said source, a transmitting tape, means for utilizing said motor to impart lineal motion to said tape, a secondary current derived through the medium of said transformer from said primary current and displaced in its phase relation thereto, a plurality of the printing types, operating magnets therefor, and means for utilizing the maximum instantaneous value of said secondary currents at instants of the cessation of the motion of said tape to impress upon said operating magnets current impulses of variant polarity and intensity.

10. In a printing telegraph system, a source of alternating current, a transformer the primary of which is connected to said source, a ratchet motor connected to said source, a transmitting tape, means for utilizing said motor to impart lineal motion to said tape, a secondary current derived through the medium of said transformer from said primary source and displaced in its phase relation thereto, a plurality of printing types, a polarizing magnet associated with all of said types, an operating solenoid associated with each of said types, and means for utilizing the maximum instantaneous value of said secondary current at instants of cessation of motion of said transmitting tape to impress upon certain groups of said operating solenoids current impulses of variant polarity and definite intensity and to impress upon other groups of said operating solenoids current impulses of variant intensity and definite polarity.

11. In a printing telegraph system, a transmission line, a transmission tape, a first source of alternating potentials for moving said tape intermittently, means for deriving a secondary source of alternating potential inductively from said first source for impressing transmission currents on said line and means whereby said tape is moved between the maxima of potentials of said second source.

12. In a printing telegraph system, a transmission line, a transmission tape, an impulse motor for driving said tape, a series of motor driving impulses, a series of intermittent potentials having successive maXima with intervals therebetween and adapted to be applied to said line through the action of said tape, and means for maintaining such a phase relation between said motor driving impulse and said intermittent potentials as to allow said motor driving impulse to operate said motor between successive maxima of said intermittent potentials.

13. In a printing telegraph system, a line, a first alternating potential, a perforated tape, a motor driven by said first alternating potential and driving said tape and means for deriving a second alternating potential from said, first alternating potential, said second alternating potential being governed in its application to said line by said tape.

14. In a printing telegraph system, a transmission line, a plurality of printing types, operating electro magnets associated therewith and connected to said line, alternating potentials from a first source for imressin currents u on said line and said magnets, a perforated transmission tape controlling the application of said alternating potentials to saidline and said magnets, alternating potentials from a second source for moving said tape between the maXima of said potentials, and means for deriving said first source of potentials from said second source of potentials.

15. In'a printing telegraph system, a line,

a pluralityof printing types, operating electromagnets associated therewith and connected to said line, a series of intermittent potentials having successive maxima with intervals between, a perforated tape governingthe application of said potentials to said line and said magnets, an impulse motor for driving said perforated tape, and a series of motor driving impulses acting in the intervals between the successive maXima of .the said series for application to theline and means for inductively deriving said series of tively deriving said first alternating potential from said second alternating potential.

17. In a printing telegraph system, a source of primary current, a transmitting tape, means for utilizing current from said source to shift said tape, means for deriving 'a secondary current inductively from said source of primary current, a plurality of printing types, operating magnets associated therewith and means for utilizing said tape when shifted and jointly with current from said secondary source to selectively impress on said operating magnets, current impulses of variant polarities.

' 18. In a printing telegraph system, a source of primary current, means for inductively deriving a source of secondary current from said prim my current, said secondary current being displaced in its phase relation to said primary current, a transmitting tape, means for utilizing current from 'SELlCi primary source to shift said tape intermittently, 'a plurality of printing devices and operating magnets therefor and means for utilizing the maximumvalues of currents from said secondary source at .instants of cessation to said tape shifting to impress upon selected groups ofsaid operating magnets current impulses of variant polarities.

19. In a printing telegraph system, a

source of primary current, a secondary source of current, a transmitting tape, means for utilizing current from said primarysource to" shift said tape intermittently, aplurality of printing types and operating magnets associated therewith, a means for utilizing the shift of said tape by said. primary current and jointly with said secondary current to selectively impress on said operating magnets current impulses of variant polarities.

20. In a printing telegraph system, a pr1- niary source of current, ,a secondary source of current, means for deriving said currents from a; single source of energy and displacing their phase relations to each other, a transmitting tape, means for utiliz- 1ng one of said currents torimpart lineal motion to said tape, a plurality of printing elements, operating magnets associated therewith, andmeansfor utilizing the maximum instantaneous value of the other of said currents at units of cessation of the lineal motion of said tape to impress'upon said operating magnets current impulses of variant polarities. v V 4 V 21. In a printing telegraph system, aprimary source of current, a secondary; source of current, means for deriving said currents 1 from a single source of energy and for dis; placing their phase relat ons toeachother, a transmitting tape, means for utllizing one of said currents to impart lineal motion to V said tape, a plurality of printing elements;

operating magnets associated therewith and means for utilizing the maximum instantaneous value of the other'of said currents at units of, cessation of the lineal motion of said tape to impress operating currents upon said magnets. r V v r 22. In a printing telegraph system, a

source of alternating current, a transformer,

the primary of which. is connected to said source, a ratchet motor connected to said source, a transmitting tape, means for utilizing the said motor to impart lineal mo' t on to said tape,secondary. currents de-,

rived through the medium of said trans? former from said alternating current, a plurality ofprinting types, operating magnets therefor, and means for utilizing the motion of said-tape and said secondary cur rents jointly to impress upon said operatingmagnets current impulses of variant polarity.

23. A source of primary current, means for deriving a secondary current from the primary current, a series of type operated by the impulses of the secondary current, and devices operated by the primary current for controlling the impulses of the secondary current.

24. A source of primary current, means for deriving a secondary current from the primary current, a series of type, a corresponding series of magnets for operating the type, connections through which the impulses of the secondary current operate said magnets, and devices operated by the primary current for selectively controlling the impulses of the secondary current.

25. A source of primary current, means for producing a secondary current, a series of type, a magnet for each type, connections through which impulses of the secondary current flow through two magnets in series to operate them individually by impulses of opposite polarity, and devices operated by the primary current for selectively controlling the impulses of the secondary current.

26. A series of type, a magnet for each type, means for sending successive impulses to operate said magnets, an intermittently movable impulse selector, and means for causing the impulses to alternate With the movements of the selector.

Signed by me at Toronto, county of York, and Province of Ontario, in the presence of two Witnesses.

CHARLES G. ASHLEY.

Witnesses:

WM. J. HERDMAN, P. H. Fox.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner 01} Patents, Washington, D. Q,

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